74HC138D文献
74HC(T)163
74HC(T)163
DATA SHEET Product speci?cation File under Integrated Circuits, IC06 December 1990 INTEGRATED CIRCUITS 74HC/HCT163 Presettable synchronous 4-bit binary counter; synchronous reset For a complete data sheet, please also download: ? The IC06 74HC/HCT/HCU/HCMOS Logic Family Specifications ? The IC06 74HC/HCT/HCU/HCMOS Logic Package Information ? The IC06 74HC/HCT/HCU/HCMOS Logic Package Outlines Decem
利用74HC573驱动LED数码管1到4显示程序
利用74HC573驱动LED数码管1到4显示程序
利用 74HC573 驱动 LED 数码管 1 到 4 显示程序 利用 74HC573 驱动 LED 数码管 1 到 4 显示程序 ? ? ;****************************************** ? ? ORG 0000H ? ? MAIN: ? ? MOV P0,#0F9H ;送数字 1 ? ? CLR P2.4 ;置 LE 为低，开 74HC573，送 0F9H ? ? ACALL DELAY ? ? ;MOV P0,#0FFH ? ? MOV P2,#0FFH ? ? MOV P0,#0A4H ? ? CLR P2.5 ?